A multi-stage approach of simulating turbulence-induced vibrations in a wire-wrapped tube bundle for fretting wear prediction

Effect of stochastic deformation on the vibration characteristics of a tube bundle in axial flow

“…Furthermore, in reality wire-wrappers involving many contact positions are proposed in designs like MYRRHA. This will result in a more complex output behavior and probably also a higher sensitivity, as changing support conditions have a rather high influence on flow-induced vibrations and fretting (Hassan et al, 2003;Dolfen et al, 2022a). Of ultimate interest is not the vibration characteristic exactly, but predictions (in terms of probability) of excessive wear, unsafe and/or uneconomical behavior.…”

“…In addition to introducing uncertainties and changes to neutronics (de Lambert et al, 2019) and heat transfer, fuel assembly bow correlates with fretting damage as observed in PWR (Christon et al, 2016;Wanninger, 2018), although moderately (Rubiolo and Young, 2009). Fretting is one of the most important consequences of flow-induced vibrations, but its characterization is beyond the scope of current work, given the substantial computational cost that is associated with obtaining the turbulent forcing function (Dolfen et al, 2022a), as RANS-based approaches do not capture the turbulent pressure fluctuations well (Delafontaine, 2018). This work focuses on another aspect, namely the vibration characteristics quantified as frequency and damping ratio, which are affected by the presence of the LBE due to added-mass and -damping effects.…”

“…This work focuses on another aspect, namely the vibration characteristics quantified as frequency and damping ratio, which are affected by the presence of the LBE due to added-mass and -damping effects. This is also one of the steps in the multi-step methodology to predict fretting due to FIV formulated by Dolfen et al (2022a). According to Wanninger (2018) bow may result in different vibration characteristics.…”

Numerical Analysis of Flow-Induced Vibration of Heat Exchanger Tube Bundles Based on Fluid-Structure Coupling Dynamics

“…An elastic tube bundle heat exchanger can enhance heat transfer by inducing elastic tube bundle vibration with fluid. Still, tube bundle vibration will cause fatigue damage, so the design reasonably of elastic tube bundle structure is essential [19,20]. In the design of the elastic tube bundle heat exchanger, the fatigue life of the internal tube bundle should be taken into account.…”

CFD Benchmark of Pressure Drop in a 61-Pin Wire-Wrapped Assembly with Blocked Channels Using NekRS

“…This includes a study for a single pin [7], and a benchmark study for the design of the Advanced Burner Test Reactor [8]. More recently, the high-fidelity capability of Nek5000 has been leveraged for flow-induced vibration investigations in wire-wrapped geometries [9,10]. Complimenting the experimental work done at TAMU, Nek5000 was used to compare with their experimental data in unblocked channels [2].…”